Firstly to run a Factory RVC you have to buy the RCD unit with the big yellow socket in it as in the pics in this thread

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Auto tailgate has a motor in it which presumably a manual one wont. The factory parking sensors show up in either unit.

If you buy a cheapo Ebay camera it can hook up to an RCD unit WITHOUT the yellow socket which is for a factory round emblem Golf Camera. The dealer sells sunshades for the different models